摘要
采用扫描电镜和X射线衍射法,分析了EAF-AOD-VOD精炼409L不锈钢(%:0.009～0.011C、11.36～11.63Cr、0.15～0.22Ti、0.0074～0.0112N)连铸水口结瘤的物相。结果表明:水口结瘤中的物相主要有TiO2和金属。喂钛线后吹氩搅拌过强时,由于钢水的二次氧化会显著增加钢中TiO2夹杂物的数量,导致结瘤层明显变厚。喂钛线后采用吹氩弱搅拌,能尽可能排除钢中TiO2夹杂物;同时应避免连铸时铸流二次氧化,从而减少水口结瘤的发生。
The phases of clogging of nozzle during concasting of 409L stainless steel （0. 009 ～ 0.011C, 11.36 ～ 11.63Cr, 0. 15 ～0.22Ti, 0. 007 4 ～0.011 2N） melted by EAF-AOD-VOD refining has been analyzed by scanning electron microscope （SEM） and X- ray diffraction method. The results indicated that phases of clog in nozzle consisted of TiO2 and metal; and with over strong argon stirring after titanium wire feeding the amount of TiO2 inclusion obviously increased due to reoxidization of molten steel, it led to clog being obvious thickening. The clogging of submerged entry nozzle decreased by using soft argon stirring after titanium feeding to remove TiO2 inclusion in molten steel and avoiding reoxidization of cast strand.
出处
《特殊钢》
北大核心
2006年第6期50-51,共2页
Special Steel
关键词
409L不锈钢
TIO2
连铸
浸入式水口
结瘤
409L Stainless Steel, TiO2, Concasting, Submerged Entry Nozzle, Clogging
作者简介
郑宏光（1966-），男，博士，高级工程师，2005年毕业于北京科技大学钢铁冶金专业（博士），不锈钢生产工艺和产品开发。
